AU SPARK will use AU's Microsoft Account for authentication starting from June 1, 2022 onward. It is the same username and password you use to log in to Microsoft Teams.
https://its.au.edu/new-au-spark-manual-for-student.html
Contact us to get support
Office of Information Technology Services : Hua Mak Campus E Building 6th floor,
Email : helpdesk@au.edu
Tel. : (66) 0-2300-4543-62 Ext. 3333
Line : AU ITS Line